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Chapter 21. Troubleshooting Installation on an IBM System z System

21.1. You are Unable to Boot Red Hat Enterprise Linux
21.1.1. Is Your System Displaying Signal 11 Errors?
21.2. Trouble During the Installation
21.2.1. No devices found to install Red Hat Enterprise Linux Error Message
21.2.2. Trouble with Partition Tables
21.2.3. Other Partitioning Problems
21.2.4. Are You Seeing Python Errors?
21.3. Problems After Installation
21.3.1. Remote Graphical Desktops and XDMCP
21.3.2. Problems When You Try to Log In
21.3.3. Your Printer Does Not Work
21.3.4. Apache-based httpd service/Sendmail Hangs During Startup
This appendix discusses some common installation problems and their solutions.

21.1. You are Unable to Boot Red Hat Enterprise Linux

21.1.1. Is Your System Displaying Signal 11 Errors?

A signal 11 error, commonly know as a segmentation fault, means that the program accessed a memory location that was not assigned to it. A signal 11 error may be due to a bug in one of the software programs that is installed, or faulty hardware.
Ensure that you have the latest installation updates and images from Red Hat. Review the online errata to see if newer versions are available.